I think the comment generation from BOUML may be wrong. The model we defined in BOUML and exported had XMI like below. There is one sample of class from "Release_102::org::openehr::rm::ehr_extract" package. The owned Comment is just inner element but it does not annotate class. Such comment is not a documentation.

<packagedElement xmi:type='uml:Class' xmi:id='BOUML_0x1ff02_4' name='PARTY_SELF' visibility='package'> <ownedComment xmi:type='uml:Comment' xmi:id='_18_1_83e026d_1424861995349_946692_4495' body='Party proxy representing the subject of the record. Used to indicate that the party is the owner of the record. May or may not have external_ref set. '> <annotatedElement xmi:idref='BOUML_0x1ff02_4'/> </ownedComment> <generalization xmi:type='uml:Generalization' xmi:id='BOUML_0x1f682_0' general='BOUML_0x1fe02_4'/> </packagedElement>